Wireless power transmitter and method that transmits resonance power using multiple bands

• US 8,987,942 B2
• Filed: 08/26/2011
• Issued: 03/24/2015
• Est. Priority Date: 08/26/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Dong Zo, Kwon, Sang Wook, Park, Yun Kwon, Park, Eun Seok, Hong, Young Tack, Kim, Nam Yun, Choi, Jin Sung, Ryu, Young Ho
• Primary Examiner(s): Deberadinis, Robert L.
• Application Number:
  US13/218,897
• Publication Number:
  US 20120049647A1
• Time in Patent Office: 1,306 Days
• Field of Search: 307/104
• US Class Current: 307/104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

A wireless power transmitter that transmits a resonance power via a multi-band resonator and a method thereof are provided. According to an aspect, a wireless power transmitter may include: a source unit configured to generate resonance power; a power amplifying unit configured to amplify the resonance power; and a multi-band resonance unit including at least two resonators, the at least two resonators configured to transmit the amplified resonance power to target resonators using different resonance bands.

Claims

1. A wireless power transmitter comprising:

a source unit configured to generate resonance power;

a power amplifying unit configured to amplify the resonance power to generate fundamental resonance power and harmonic resonance power; and

a multi-band resonance unit comprising at least two resonators configured to transmit the fundamental resonance power and the harmonic resonance power to respective target resonators simultaneously using different resonance bands.

2. The wireless power transmitter of claim 1, wherein:

the fundamental resonance power is of a fundamental band;

the harmonic resonance power is of a harmonic band; and

the at least two resonators comprise a fundamental resonator configured to transmit the fundamental resonance power to a first target resonator, and a harmonic resonator configured to transmit the harmonic resonance power to a second target resonator.

3. The wireless power transmitter of claim 1, wherein the harmonic resonance power is generated in response to the resonance power passing through the power amplifying unit that is a non-linear element.

4. The wireless power transmitter of claim 1, wherein the harmonic resonance power has lower power than the fundamental resonance power.

5. The wireless power transmitter of claim 1, wherein the at least two resonators comprise:

a fundamental resonator configured as a loop that transmits the fundamental resonance power of a fundamental band to a first target resonator; and

a harmonic resonator configured as a loop that transmits the harmonic resonance power of a harmonic band to a second target resonator.

6. The wireless power transmitter of claim 1, wherein the source unit is configured to receive energy to generate the resonance power.

7. The wireless power transmitter of claim 1, wherein the at least two resonators are configured to:

transmit the fundamental resonance power in a fundamental band; and

simultaneously transmit the harmonic resonance power in a harmonic band.

8. A method of transmitting a multi-band resonance power in a wireless power transmitter, the method comprising:

generating resonance power;

amplifying the resonance power to generate fundamental resonance power and, harmonic resonance power; and

transmitting, to respective target resonators, the fundamental resonance power and the harmonic resonance power simultaneously using different resonance bands.

9. The method of claim 8, wherein:

the fundamental resonance power is of a fundamental band;

the harmonic resonance power is of a harmonic band; and

the transmitting comprises transmitting, using a fundamental resonator, the fundamental resonance power to a first target resonator, and transmitting, using a harmonic resonator, the harmonic resonance power to a second target resonator.

10. The method of claim 8, wherein the harmonic resonance power is generated in response to the resonance power passing through a power amplifying unit that is a non-linear element.

11. The method of claim 8, wherein the harmonic resonance power has lower power than the fundamental resonance power.

12. The method of claim 8, further comprising:

receiving energy to generate the resonance power.

13. A wireless power transmitter comprising:

an amplifier configured to amplify resonance power to generate fundamental resonance power and harmonic resonance power; and

a plurality of resonators configured to transmit the fundamental resonance power and the harmonic resonance power to respective target resonators simultaneously using different resonance bands.

14. The wireless power transmitter of claim 13, wherein the harmonic resonance power has lower power than the fundamental resonance power.

15. The wireless power transmitter of claim 13, wherein the plurality of resonators comprise:

a fundamental resonator configured to transmit the fundamental resonance power to a first target resonator; and

a harmonic resonator configured to transmit the harmonic resonance power to a second target resonator.